crystallization
n . 结晶化
结晶化
crystallization 结晶
crystallization 结晶
crystallization n 1 :
the formation of crystals [
synonym : {
crystallization },
{
crystallisation }, {
crystallizing }]
2 :
a rock formed by the solidification of a substance ;
has regularly repeating internal structure ;
external plane faces [
synonym : {
crystal }, {
crystallization }]
3 :
a mental synthesis that becomes fixed or concrete by a process resembling crystal formation Crystallization \
Crys `
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za "
tion \
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kr [
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s `
tal *
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n . [
Cf .
F .
cristallization .]
1 . (
Chem . &
Min .)
The act or process by which a substance in solidifying assumes the form and structure of a crystal ,
or becomes crystallized ;
the formation of crystals .
[
1913 Webster ]
2 .
The body formed by crystallizing ;
as ,
silver on precipitation forms arborescent crystallizations .
[
1913 Webster ]
Note :
The systems of crystallization are the several classes to which the forms are mathematically referable .
They are most simply described according to the relative lengths and inclinations of certain assumed lines called axes ;
but the real distinction is the degree of symmetry characterizing them .
1 . {
The Isometric system },
or {
The Monometric system }
has the axes all equal ,
as in the cube ,
octahedron ,
etc .
2 . {
The Tetragonal system },
or {
The Dimetric system }
has a varying vertical axis ,
while the lateral are equal ,
as in the right square prism .
3 . {
The Orthorhombic system },
or {
The Trimetric system }
has the three axes unequal ,
as in the rectangular and rhombic prism .
In this system ,
the lateral axes are called ,
respectively ,
macrodiagonal and brachydiagonal . --
The preceding are erect forms ,
the axes intersecting at right angles .
The following are oblique .
4 . {
The Monoclinic system },
having one of the intersections oblique ,
as in the oblique rhombic prism .
In this system ,
the lateral axes are called respectively ,
clinodiagonal and orthodiagonal .
5 . {
The Triclinic system },
having all the three intersections oblique ,
as in the oblique rhomboidal prism .
There is also :
6 . {
The Hexagonal system } (
one division of which is called Rhombohedral ),
in which there are three equal lateral axes ,
and a vertical axis of variable length ,
as in the hexagonal prism and the rhombohedron .
[
1913 Webster ]
Note :
The Diclinic system ,
sometimes recognized ,
with two oblique intersections ,
is only a variety of the Triclinic .
[
1913 Webster ]
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